ß-lactamase-producing Gram-negative bacteria in an intensive care unit in southern Brazil
Braz. J. Pharm. Sci. (Online)
;
53(2): e16111, 2017. tab
Article
in English
| LILACS
| ID: biblio-839487
ABSTRACT
ABSTRACT The present study evaluated the antimicrobial susceptibility profile, ß-lactamase production, and genetic diversity of Enterobacteriaceae, Pseudomonas aeruginosa, and Acinetobacter spp. using phenotypic identification, antimicrobial susceptibility testing, and ß-lactamase phenotypic detection. Isolates were obtained from patients in an intensive care unit in a hospital in southern Brazil. Bacterial genomic DNA was extracted, followed by the genotypic detection of carbapenemases and enterobacterial repetitive intergenic consensus-polymerase chain reaction (ERIC-PCR). Fifty-six isolates (26 Klebsiella pneumoniae, five Escherichia coli, three Enterobacter aerogenes, nine P. aeruginosa, and 13 Acinetobacter spp.) were evaluated. The phenotypic extended spectrum ß-lactamase (ESBL) test was positive in 53.8% of the K. pneumoniae isolates, 100.0% of the E. coli isolates, and 100.0% of the E. aerogenes isolates. Phenotypic and genotypic testing of K. pneumoniae carbapenemase (KPC) was positive in 50.0% of the K. pneumoniae isolates. Phenotypic and genotypic testing showed that none of the P. aeruginosa or Acinetobacter spp. isolates were positive for metallo- ß-lactamase (MBL). The bla OXA gene was detected only in Acinetobacter spp. The lowest genetic diversity, determined by ERIC-PCR, was observed among the KPC-producing K. pneumoniae isolates and OXA-producing Acinetobacter spp. isolates, indicating the inadequate dissemination control of multidrug-resistant bacteria in this hospital environment.
Full text:
Available
Index:
LILACS (Americas)
Main subject:
Beta-Lactamases
/
Gram-Negative Bacteria
/
Intensive Care Units
Limits:
Female
/
Humans
/
Male
Country/Region as subject:
South America
/
Brazil
Language:
English
Journal:
Braz. J. Pharm. Sci. (Online)
Journal subject:
Farmacologia
/
Teraputica
/
Toxicologia
Year:
2017
Type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
State University of Maringa/BR
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